Question

If x = 1 y = 2, then value of 22x + 3y = K.
(a) 10
(b) 8
(c) 6
(d) 21​

Answer 1

Step-by-step explanation:

Disclaimer: There is error in the Q. In (II) there should have been 2x - 3y = 12

5x + 3y = 9 -----(I)

2x - 3y = 12 ----- (II)

Add (I) and (II)

7x = 21

x = 3

Putting the value of x = 3 in (I) we get

5(3)+3y=9⇒15+3y=9⇒3y=9-15=-6⇒y=-2

Thus, (x, y) = (3, -6).

Answer 2

Answer:

x=1

y=2

2x+3y=K.

2(1)+3(2)=k.

2+6=k

k=8.

(b)

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